Q. A cut diamond sparkles because of its
A) Hardness
B) High refractive index
C) Emission of light by the diamond
D) Absorption of light by the diamond
Explanation
(b) Due to high refractive index its critical angle is very small so that most of the light incident on the diamond is total internally reflected repeatedly and diamond sparkles
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.